Managing Storage Overview
In the chapter Managing Storage some important points are given below
- Today’s drives are either IDE drives (mostly found on consumer computers) or SCSI drives (mostly found in servers).
- A redundant array of independent disks (RAID) uses two or more drives in combination to create a fault-tolerant system that protects against physical hard drive failure and increase hard drive performance.
- With striping (RAID 0), all available hard drives are combined into a single large virtual file system, with the file system’s blocks arrayed so that they are spread evenly across all the drives. Unfortunately, striping offers no fault tolerance.
- Disk mirroring (RAID 1) copies a disk or partition onto a second hard drive. Then, as information is written, it is written to both hard drives simultaneously.
- RAID 5 is similar to striping except that one of the hard drives is used for parity (error correction) to provide fault tolerance.
- RAID 1″0 is a mirrored dataset (RAID 1), which is then striped (RAID 0).
- When a drive fails, some systems use hot spares so that the system will automatically replace the failed drive and rebuild or restore the missing #data.
- Network attached storage (NAS) is a file-level data storage device that is connected to a computer network to provide shared drives or folders, usually using SMB.
- A storage area network (SAN) is an architecture used for disk arrays, tape libraries, and optical jukeboxes to appear as locally attached drives on a server.
- A host adapter, sometimes referred to as host bus adapter (HBA), connects a host system such as a computer to a network or storage devices.
- Logical unit numbers (usually referred to as LUNs) allow a SAN to break its storage into manageable pieces, which are then assigned to one or more servers in the SAN.
- Fibre Channel and iSCSI are gigabit-speed technologies primarily used for storage networking.
- Microsoft Windows Server 2008 includes two iSCSI Initiator software interfaces (iSCSI Initiator and iSCSICLI command interface) to connect an iSCSI storage array or volume of a storage array to a server and mount the array or volume as a local volume.
- Windows Server 2008 includes Storage Explorer and Storage Manager for SANs to manage Fibre Channel, iSCSI fabrics, and LUNs.
- Partitioning is defining and dividing a physical or virtual disk into logical volumes called partitions. Each partition functions as if it were a separate disk drive that can be assigned a drive letter.
- Formatting a disk prepares the disk’s file system.
- Windows Server 2008 supports two types of disk partitioning styles: Master Boot Record (MBR) and GUID Partition Table (GPT).
- In Windows Server 2008, a basic disk is the same type of disk found in earlier versions of Windows.
- When using MBR, basic disks gave you either four primary partitions or three primary partitions and one extended partition.
- Dynamic disks offer increased flexibility, including up to 2,000 volumes and the ability to extend or shrink a disk without requiring a reboot.
- Dynamic disks support five types of volumes: simple volumes, spanned volumes, striped volumes, mirrored volumes, and RAID-5 volumes.
- A file system is a method of storing and organizing computer files and the data they contain to make it easy to find and access this information. A file system also maintains the physical location of the files so you can find and access the files in the future.
- Currently, NTFS is the preferred file system, in part because it supports much larger hard disks (up to 16 exabytes) and long filenames.
- NTFS is a journaling file system that makes sure a disk transaction is written properly before it is recognized.
- NTFS offers better security through permissions and encryption.
- The main tool used to manage disks in Windows Server 2008 is the MMC snap-in called Disk Management, which is also part of the Computer and Management consoles.
- When you prepare a volume in Windows, you can assign a drive letter to the new volume, or you can create a mount point to the new volume as an empty NTFS folder.
Topics discussed in this chapter Managing Storage are
For larger corporations, servers may connect to centralized devices that contain large amounts of storage. These devices offer better performance ...
This chapter is a part of 98-365 Windows Server Administration Fundamentals Prep course. More chapters in this course are
The Practice tests included in this course are:
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